Não informado. (1999). The Journal of Combinatorial Mathematics and Combinatorial Computing. Charles Babbage Research.
शिकागो शैली (17वां संस्करण) प्रशस्ति पत्रNão informado. The Journal of Combinatorial Mathematics and Combinatorial Computing. Winnipeg, Canada: Charles Babbage Research, 1999.
एमएलए (8वां संस्करण) प्रशस्ति पत्रNão informado. The Journal of Combinatorial Mathematics and Combinatorial Computing. Charles Babbage Research, 1999.
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